Display screen or portion of a device with transitional graphical user interface



FIG. 1 is a front view of a first image of a display screen or portion of a device with transitional graphical user interface;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof;

FIG. 4 is a front view of a forth image thereof;

FIG. 5 is a front view of a fifth image view thereof;

FIG. 6 is a front view of a sixth image thereof;

FIG. 7 is a front view of a seventh image thereof;

FIG. 8 is a front view of an eighth image thereof;

FIG. 9 is a front view of a ninth image thereof;

FIG. 10 is a front view of a tenth image thereof; and,

FIG. 11 is a front view of a eleventh image thereof.

The broken line shown in each of FIGS. 1-11 is included for the purpose of showing a portion of the display screen and forms no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-11. The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen or portion of a device with transitional graphical user interface, as shown and described. 